Dress for grinding-rings



(Model.)

H. C. STAVER. DRESS FOR GRINDING RINGS.

No. 464459Z.v Patented Deo. 8, 1891.

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Nrrni) STATES' ATENT OFFICE.

HENRY C. STAVER, OF CHICAGO, ILLINOIS.

. DRESS FOR GRINnuwe-RINGS.4

SPECIFICATION forming part of Letters Patent No. 464,592, dated December8, 1891.

Application filed March 30, 1891. Serial No. 387,049. (Model.)

.T a/ZZ whom, it may concern:

Be it known that I, HENRY C. STAVER, a citizen of the United States,residing atChicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Dresses forGrinding-Rings; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which it pertains to make and use the same,reference being had to the acompanying drawings,formin g a parthereof,in which- Figure lis a plan or face viewof one of thegrinding-rings. Fig. 2 is a detail, being a cross-section from the eyeto the periphery of the ring in front of one of the wings. Fig. 3 is adetail, being an edge view on the inside of the eye. Fig. 4 is a detailin section showing the reducing ridges. Fig. 5 is a detail, being anedge view of the periphery of the ring.

This invention relates to grinding-rings of that class in which twocompanion rings are employed, one stationary and the other revolving,each ring having a grinding-face; and the object of the invention is toimprove the dress of the grinding-face of the rings and insure acontinuous feed, a positive reduction, and a final finish of the grain;and to this end the nature of the invention consists in the dresshereinafter more particularly described, and pointed out in the claimsas new.

In the drawings, A represents a grinding- .ring made of cast metal orother suitablematerial; B, the eye of the ring. Only one ring is shown;but the companion ring is similar thereto in every respect, so that adescription of the dress of the ring shown will be also a description ofthe dress of the companion ring.

The acting face of the ring A, starting from the eye B, and extending ona tangent toward the periphery, has a series of wings a, the tangentiallines of which are from a circle of a less diameter than the circle ofthe eye of the ring, and each wing a on its front side has an abruptface forming a breast b, which breast is highest at its inner end, asshown.

in Figs. 2 and 3, and gradually decreases in height until it joins thefirst reducing-face of the ring. The rear face of each wing is concave,forming adepression @,Which gradually ridges to the reducing face ordress. p j grain is held against the breast b, within the 'depressionbetween the wings a', and by the ldecreases in depth and width from theeye to lpression partly formed by the depression c of the rear face ofeach wing, and this depression has on the face or bottom ridges d, withchannels running tangentially from a circle of less diameter than thecircle of the eye of the ring to and across the reducing-face of thering. The ridges CZ act to catch and partially break the grain, andthechannels or drifts between the ridges d furnish a means for feedingthevgrain in connection with the The rotation ofgthering is forced outfrom the depressions by the action of the ridges d and the driftsbetween such ridges.

The reducing face or dress of the ring is adjacent to the depressionbetween the wings a, and is formed of a series `of grooves 0r drifts e,extending across the ring on tangential lines from "a circle of lessdiameter than the circle of the eyeof the ring, anda series of groovesordrifts f, crossing the groovesor drifts e, and also on tangentiallines, which grooves or drifts e and f cut the face of the ring to forma series of diamond-shaped teeth g, as shown in Fig. l, and the groovesor drifts e and f extend onto and across the face of each wing a andenter into the depression between the wings ct, as shown in Fig. l.

The dress formed by the grooves or drifts e and f terminates in anannular groove 7L, extending entirely around the ring, and this groove'hatintervals has stops or breasts fi,

forming the groove h into a series of pockets to receive the reducedmaterial from the diamond-dress and deliver it to the finishingdress,which dress is formed of a series of teeth j, each having its actingface in'clined with the direction of rotation of the ring or backward.

The operation is as follows: The grain is entered into the depressionsbetween the wings a, and by the rotation of the ring isforcedoutwardintothediamond-dressthrough the action of the face of thedepression c, the ridges d, and the drifts between the ridges d, ands'uch outward carrying of the grain is IOO had by the direction of thetangent ot the ridges cl, which is backward as against the rotation ofthe ring, and with this carrying of the grain outward the ridges d actto partially reduce the saine sufficiently for entering the grooves ordrifts e and f, and the grain entering the grooves or drifts f isreduced by the action of the diamond-teeth g, and by the rotation of thering, in connection with the grooves or drifts e and f, is carried orforced outward in a reduced condition into the pockets of the groove h,and the grain entering these pockets by the action of the breasts t' isheld against the rotation of the ring, and is thereby forced into thefinishing-dress formed by the teeth j, from which dress the lnaterial isdelivered in its finished condition. The grain when first received bythe ring, is held in the depression between the wings a, and by therotation of the ringforward is brought in contact with thebreast b, andheld by such breasts so as to be fed by the action of the face of thedepression c and the ridges (Z into the grinding-face formed by thegrooves or drifts e and fand the teeth g, and these wings a, with theirbreasts b, perform no office in the reduction of the grain, but simplyfurnish a stop against which the grain is forced, and by which the grainis fed outward to the grinding-face. The grain after being reduced inthe grinding face or dress formed by the grooves or drifts e fand teethg enters the pockets of the groove h," and the material thus entered isbacked against the breasts t' and there held, so as to be forced outwardby the rotation of the ring into the iinishingdress, and `this result ishad by the breasts t, which perform no oiiice in reducing the grain ormaterial, but simply act to force the grain or material into the finalgrinding-face.

It will thus be seen that a positive feed of the grain to the grindingface or dress is had by the action of the wings a and their breasts Z),that the grain is partially reduced between the first grinding face ordress, and that a positive feed to the final grinding face or dress ishad by the action of the breasts t', the result being a positive feed ofthe grain and a positive reduction thereof.

Vhat I claim as new, and desire to secure by Letters Patent, is

l. The combination, in a grinding-ring,` of a series of wings a, locatedaround the eye of the ring, and each having a feeding-breast b, a seriesof depressions around the eye of the ring and between the wings a andeach having feeding and breaking ridges cl, and a reducing-dress formedof grooves or drifts e and f, crossing each other and forminggrindingteeth g, substantially as and for the purposes speciiied.

2. The combination, in a grinding-ring,of a

series of wings a, located around the eye of v the ring and each havinga feeding-breast b, a series ot' depressions between the wings, eachdepression having reducing and feeding ridges d, a reducing-faceconsisting of grooves or drifts e and f crossing each other and forminggrinding-teeth g, an annular'groove 7L, eucircling the grinding-teeth g,breasts t', dividing the groove hinto pockets, and a reducing faceformed of teethy j, substantially as and for the purposes specified.

3. The combination, in a grinding-ring, of a grindingface having groovesor drifts e and f, crossing each other and forming grindingteeth f, anannular groove h, encircling the grinding-teeth g, breasts t', dividingthe annular groove h, and a uishiug-dress formed by teeth j,substantially as and for the purposes specilied.

HENRY C. STAVER.

Vituesses:

O. W. BOND, F. W. ROBINSON.

